Who called from 9522153698

I've been getting calls for days from "unknown number" ... I tried *69 and
was told it didn't work with this number.  I don't want to answer it.
Who uses this in their caller ID ... It says "unknown name" "unknown number"

I keep getting calls from this number.  Greg Barker with Belzer Attorneys Office.  He calls leaves a message to call 800-511-6409

they will not say what its about except business   . very strange

Called.  I did not answer.  Caller ID said CPC.